<template>
  <button class="h-btn" :class="[typeClass, sizeClass]" @click="clickHandler">
    <slot />
  </button>
</template>

<script>
export default {
  props: {
    type: {
      type: String
    },
    size: {
      type: String,
      validator: function (value) {
        // value当前传过来的值
        return ['small', 'large'].includes(value)
      }
    }
  },
  computed: {
    typeClass () {
      return `h-btn-${this.type}`
    },
    sizeClass () {
      return `h-btn-${this.size}`
    }
  },
  methods: {
    clickHandler (e) {
      this.$emit('click', e)
    }
  }
}
</script>

<style scoped lang="less">
    // 默认背景色 默认大小
    .h-btn {
      line-height: 1.499;
      position: relative;
      display: inline-block;
      font-weight: 400;
      white-space: nowrap;
      text-align: center;
      background-image: none;
      box-shadow: 0 2px 0 rgba(0, 0, 0, 0.015);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
      -webkit-user-select: none;
      -moz-user-select: none;
      -ms-user-select: none;
      user-select: none;
      touch-action: manipulation;
      padding: 5px 10px;
      font-size: 14px;
      border-radius: 4px;
      color: rgba(0, 0, 0, 0.65);
      background-color: #fff;
      border: 1px solid #d9d9d9;
    }
    .h-btn-default:focus {
      outline: 0;
    }
     // primary类
    .h-btn-primary {
      color: #fff;
      background-color: #1890ff;
      border-color: #1890ff;
      text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.12);
      box-shadow: 0 2px 0 rgba(0, 0, 0, 0.045);
    }
    // danger类
    .h-btn-danger {
      color: #fff;
      background-color: #ff4d4f;
      border-color: #ff4d4f;
      text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.12);
      box-shadow: 0 2px 0 rgba(0, 0, 0, 0.045);
    }
    // size:small
    .h-btn-small {
      padding: 4px 8px;
      font-size: 12px;
    }
    // size:large
    .h-btn-large {
      padding: 6px 12px;
      font-size: 16px;
    }
</style>
